@ArtsyPowerApper shows how to use the Microsoft Translator connection to translate your app based on their selection from a drop down! So easy and fast, and kicks your apps up a notch!
P.S. You might notice some mistranslations (sorry I noticed after publishing) - to avoid those do not use capitals in the titles of the SharePoint list (as it can indicate proper names). If you run into issues with this translators accuracy, please post them in the community forum for connections here:
https://powerusers.microsoft.com/t5/Connectors/bd-p/PA_Connectors
Enjoy!
References:
https://docs.microsoft.com/en-us/connectors/microsofttranslator/
https://docs.microsoft.com/en-us/powerapps/connections/connection-microsoft-translator